If you are going to stay NA for a while longer, I would recommend staying with a max of 2.25 exhaust. If you are going to supercharge, go bigger. Just think, you are putting more air into the engine, you have to allow for way more air to come out! As far as the CAT. Unless you are going to cut it out completely, save your money. My exhaust guy showed me a standard CAT beside a "high flow" one and guess what? They are identical. Only diference is one is shinny! I put magnaflow duels on mine with the factory CAT and I'm happy! Hope this helps! Merry Christmas
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Ahhhhh!!!!!! Don't Scratch My Paint!!!!
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